arohner (@arohner) profile picture

arohner

@arohner

Entrepreneur. Founder, CTO @griffinbank. Founder, ex-CTO @circleci. Clojure contributor.

 Austin, TX
griffin.com
Joined October 2008
  • Tweets2.8K
  • Following120
  • Followers578
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Photo by arohner (@arohner)Photo by arohner (@arohner)Photo by arohner (@arohner)Photo by arohner (@arohner)Photo by arohner (@arohner)Photo by arohner (@arohner)Photo by arohner (@arohner)
arohner retweeted
JUXT (@juxtpro) profile picture
JUXT@juxtpro15 Dec 2023
🎁 Day 1⃣5⃣ — JUXT Content Advent Calendar 🗓️🎄 🥇🏆 Our No. 1 post in 2023 was the Clojure In interview we did with @griffinbank's CTO & Co-founder @arohner — where he shared how they’ve built a fully-regulated, API-driven bank, using Clojure 💡➡️ juxt.pro/blog/clojure-in-gri…
JUXT Blog: Clojure in Banking: Griffin

JUXT Blog: Clojure in Banking: Griffin

A fully-regulated, API-driven bank built with Clojure, enabling fintech companies to integrate banking features quickly and securely

juxt.pro
JUXT (@juxtpro) profile pictureJUXT@juxtpro1 Dec 2023
🎄❄️ It's December! ☃️🎅 🥂 The countdown to Christmas has officially begun! 🎀 Exciting news: today we unveil the JUXT Content Advent Calendar 🗓️ 🎁 Throughout December, we'll share a daily dose of our top content from 2023: blogs, webinars, talks & podcasts. 🍷 Enjoy 💝
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✨ We’re super excited to announce that we are now a UK bank!! 🏦 . Read all about it here: blog.griffin.sh/2023/03/07/i… #thebankyoucanbuildon #bank #Griffin
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arohner retweeted
arohner (@arohner) profile picture
arohner@arohner2 Sep 2021
Bazel has a high learning curve, but big payoff. Our Circle config went from machine medium x8 to xlarge x1, and halved CI time. The build on master after merging a PR build is now a nop on tests, because the test results are cached.
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After a long hiatus the REPL podcast is back! This week I'm talking with @arohner about banking, Bazel, spectrum, and Clojure. therepl.net/episodes/38/
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Awesome to finally be able to announce the €7.2 million round we (@griffinplatform) did over the summer with @eqtventures! eu-startups.com/2020/11/lond… #banking #fintech #london #bankingasaservice
London-based Banking-as-a-Service provider Griffin secures €7.2 million | EU-Startups

London-based Banking-as-a-Service provider Griffin secures €7.2 million | EU-Startups

UK fintech startup Griffin today announces an approx. €7.2 million round led by EQT Ventures to build an API-first bank that will dramatically lower the

eu-startups.com
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We are hiring at @griffinplatform for a bunch of roles! Looking for our first product manager (impact!), a bunch of eng roles (#clojure #kafka #datomic #kubernetes), and more! Check out our jobs page at griffin.sh/jobs #fintech #hiringnow
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(spoiler: it was me and @arohner). Thanks Patrick for your unflagging support!
Patrick McKenzie (@patio11) profile picturePatrick McKenzie
@patio118 Aug 2019
Internet fist bump to the entrepreneur who, in April 2017, asked me how to go about doing an extremely ambitious company and who has sent 2 years worth of updates titled: $COMPANY: $MONTH $YEAR The last one: "We did it! Finally have $NUMBER in the bank!" (Now the work begins.)
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Putting it out there again for all you #clojure nerds - we’re hiring at @griffinbank! Come join us and help build an API-first platform bank.
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1/ More thoughts on Libra et al: so the central-ish conceit of stablecoins is that there are actual cash and assets underpinning the currency. This maps to the way EU regulations currently regard "electronic money", whether that money is crypto or not.
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1/ One thing that continues to stand out to me as the stablecoin discussion evolves is the almost total disregard and lack of awareness of existing money transmission and money laundering regulations.
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One more step towards the GraphiQL IDE you didn't know you wanted onegraph.com/blog/2019/05/03…
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Replying to @patio11 @TrevMcKendrick
A thought I've often had about the tribes: you can be an email person or a phone person, but only relatively few people/organizations are truly multitribal on these issues. What organizations are the texting tribe or Slack tribes are going to create, and how will they be weird?
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Everybody has a plan until they deploy to production.
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All enterprise software competes with Excel. All productivity software competes with emailing things to yourself.
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OH: Differential calculus is easy, but not simple. Lambda calculus is simple, but not easy.
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2/ Why did all these rich and famous people cheat and bribe their kids into school? To help them get an education, or to help them get a credential?
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Write Tests Mostly Unit Tests Avoid Mocks
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It's public now: @Stripe is building a typechecker for #Ruby with emphasis on scalability and user-friendliness. Currently presenting it at #RubyKaigi with @nelhage and @ptarjan. Try it: sorbet.run/ . See it at Tachibana room at #RubyKaigi2018
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One of the most useful ways to categorize type systems is: - is it Hindley-Milner based? (Rust, Haskell, OCaml) - or does it support implicit subtyping (TypeScript, Flow, C#)? The first: 1 expression <-> at most 1 type. The second: 1 expression <-> multiple types. A thread 👇
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For me the strong typing debate comes down to how tight the feedback cycle is. With Rails, refresh page -> see the bug. Dynamic typing is faster. But with say an iOS app where you’re compiling before you can interact, strong typing gives you quick feedback on the dumb typos.
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